Don't think that sounds correct.. Jim Carter sells the same 6V gauge for both Chevy and GMC, 1950

Also this

If a person is converting to neg ground, the sender wire still goes to the gauge sender terminal, the power (ignition switch "ON") still goes to the gauge power terminal and gauge frame needs ground. You don't change gauge polarity, you change battery polarity. Like light bulbs don't need polarity change. Just battery, coil and probably ammeter need polarity change. You don't change any other polarity.


In your case, you are putting everything back the way it was, (positive ground) so actually no change from original. Sounds like you got messed up when you thought you had to convert to negative ground for the gauge. That was wrong info unless there is something/some action you don't include here. Put the battery back to pos gnd, coil back to pos gnd, and report results before moving forward. What exacly did the gas gauges do, that you say "do not function"?

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn